Search results for "Multilevel systems"

showing 2 items of 2 documents

Experimental Validation of a Novel Method for Harmonic Mitigation for a Three-Phase Five-Level Cascaded H-Bridges Inverter

2019

In modern high-power electrical drives, the efficiency of the system is a crucial constraint. Moreover, the efficiency of power converters plays a fundamental role in modern applications requiring also a limited weight, such as the electric vehicles and novel more electric aircraft. The reduction of losses pushes for systems with a dc bus and a high number of dc/ac converters, widespread in the vehicle, not burdened by a too expensive data processing system. The purpose of this article is to concur to reduce losses by proposing an innovative selective harmonic mitigation method based on the identification of the working areas where the reference harmonics present lower amplitudes. In partic…

Electric machineCascade systemsfield-programmable gate arraysinvertersmultilevel systemspower conversion harmonicsbusiness.product_categoryComputer science020208 electrical & electronic engineering02 engineering and technologyConvertersSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSettore ING-INF/01 - ElettronicaIndustrial and Manufacturing EngineeringDC-BUSHarmonic analysisNonlinear systemSettore ING-IND/31 - ElettrotecnicaThree-phaseControl and Systems EngineeringHarmonics0202 electrical engineering electronic engineering information engineeringElectronic engineeringInverter020201 artificial intelligence & image processingElectrical and Electronic Engineeringbusiness
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Multilevel Modeling: Research-Based Lessons for Substantive Researchers

2017

Organizations are multilevel systems. Most organizational phenomena are multilevel in nature, and their understanding involves variables (e.g., antecedents and consequences) that reside at different levels. The investigation of these phenomena requires appropriate analytical methods: multilevel modeling. These techniques are becoming increasingly popular among organizational psychology and organizational behavior (OPOB) researchers. In this article we review the literature that has evaluated the performance of multilevel modeling techniques to test multilevel direct and indirect effects and cross-level interactions. We also provide guidelines for OPOB researchers about the appropriate use …

Multilevel systemsOrganizational Behavior and Human Resource ManagementSocial PsychologyManagement science05 social sciencesMultilevel model050401 social sciences methodsAppropriate useStructural equation modeling0504 sociologyOrganizational behavior0502 economics and businessResearch basedResearch developmentIndustrial and organizational psychologyPsychology050203 business & managementApplied PsychologyAnnual Review of Organizational Psychology and Organizational Behavior
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